Re: Issue 1156 in lilypond: Continuing slur across line containing only spacer rests leads to allocation error

[lilypond]

Comment #4 on issue 1156 by n.puttock: Continuing slur across line  
containing only spacer rests leads to allocation error
http://code.google.com/p/lilypond/issues/detail?id=1156

Hi Patrick,

> Sometimes the check for the *left* broken neighbor may be a spacer rest,
> which appears to be a generic Spanner with direction CENTER.

The left neighbour appears to be a generic Spanner since it's been  
suicided: this clears out all its private members apart from those required  
later; this obviously doesn't include the property alists, leading  
to 'direction defaulting to CENTER.

You can check whether a grob's live via is_live (); this is more generic  
than verifying that the broken slur's still got its meta field via  
has_interface ().

Cheers,
Neil